<!DOCTYPE html>
<html>
	<head>
		<meta charset="utf-8">
		<title></title>
		<script>
			function run() {
				alert("hello world");
			};
			
			var t = setInterval(run,1000);
			
			clearInterval(t);
		</script>
	</head>
	<body>
	</body>
</html>
